/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.phoenix.repository.query.jql;

import javax.jcr.query.InvalidQueryException;



/**
 * Jigsaw server
 * 
 * @author    <a href="shamphone@gmail.com">Li XiongFeng</a>
 * @date      2012-4-22
 * @version   1.0.0
 */
public class ConstraintAST  extends JQLBaseAST{

	/**
	 * 
	 */
	private static final long serialVersionUID = -85676955069135040L;
	@Override
	public String toJQL() {
		StringBuffer buffer= new StringBuffer();
		if(this.getNumberOfChildren()==1){
			buffer.append(this.getText().toUpperCase());
			buffer.append(" (");
			buffer.append(((JQLBaseAST)this.getFirstChild()).toJQL());
			buffer.append(")");			
		}else{
			buffer.append("(");	
			buffer.append(((JQLBaseAST)this.getFirstChild()).toJQL());
			buffer.append(") ");			
			buffer.append(this.getText().toUpperCase());
			buffer.append(" (");
			buffer.append(((JQLBaseAST)this.getFirstChild().getNextSibling()).toJQL());
			buffer.append(")");			
		}
		return buffer.toString();
	}
	/* (non-Javadoc)
	 * @see net.phoenix.repository.query.parser.JQLBaseAST#generateSQL(net.phoenix.repository.query.parser.JQLQuery)
	 */
	@Override
	public void generateSQL(JQL2SQL collector) throws InvalidQueryException{
		StringBuffer buffer= new StringBuffer();
		if(this.getNumberOfChildren()==1){
			((JQLBaseAST)this.getFirstChild()).generateSQL(collector);		
			String where = this.getText() +"(" + collector.pop() +")";
			collector.push(where);				
		}else{
			JQLBaseAST first = (JQLBaseAST)this.getFirstChild();
			JQLBaseAST second = (JQLBaseAST)first.getNextSibling();
			buffer.append("(");	
			first.generateSQL(collector);
			buffer.append(collector.pop());
			buffer.append(") ");			
			buffer.append(this.getText().toUpperCase());
			buffer.append(" (");
			second.generateSQL(collector);
			buffer.append(collector.pop());
			buffer.append(")");			
			collector.push(buffer.toString());
		}
	}
}
